Re: [Ocf-linux-users] Load balancing in OCF

[David M. <Dav...@se...>]

Jivin Vrabete, Brad lays it down ...
> Hi Dave,
> 
> According to this white paper (http://www.openbsd.org/papers/ocf.pdf), there
> should be a some load balancing mechanism available. Is your version based
> on FreeBSD or OpenBSD? (Are they different?)

ocf-linux is based on the FreeBSD version,  which is based on the
OpenBSD version.  A link off the ocf-linux home page points to a paper
on the changes in the FreeBSD version,  which seemed reasonable,  and
prompted using that version.

	http://www.usenix.org/publications/library/proceedings/bsdcon03/tech/leffler_crypto/leffler_crypto.pdf

Just checked the code and yes,  it does do session based load balancing.

Just search for cc_sessions in crypto.c,  easy to see it looking for
the best driver to use,  and using cc_sessions (number of sessions per
driver) to find a better match.

Cheers,
Davidm

> >-----Original Message-----
> >From: David McCullough [mailto:Dav...@se...] 
> >Sent: 19 February 2009 04:33
> >To: Vrabete, Brad
> >Cc: ocf...@li...
> >Subject: Re: Load balancing in OCF
> >
> >
> >Jivin Vrabete, Brad lays it down ...
> >> Hi Dave,
> >>
> >> Is load balancing supported in the Linux version of OCF? The FreeBSD 
> >> documentation states that it is supported there.
> >
> >For how long ?
> >
> >I checked just recently,  the FreeBSD code looked like it 
> >hadn't changed from the last OCF release.
> >
> >There is a form of "too busy try the next device" thing.  Not 
> >exactly load balancing IMO.
> >
> >Do you have a pointer to the doc ?  If it looks different I 
> >will double check te hOCF code base is up to date,
> >
> >Cheers,
> >Davidm
> >
> >--
> >David McCullough,  dav...@se...,  
> >Ph:+61 734352815
> >McAfee - SnapGear  http://www.snapgear.com                
> >http://www.uCdot.org
> >



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-- 
David McCullough,  dav...@se...,  Ph:+61 734352815
McAfee - SnapGear  http://www.snapgear.com                http://www.uCdot.org